CVE-2024-55407

Privilege escalation via unrestricted port-access IOCTLs

Published Jan 6, 2025 · Updated Jul 5, 2026

Improper access control in ITE Tech. Inc ITE IO Access 1.0.0.0 allows local users to read and write arbitrary I/O ports via crafted IOCTL requests. The WinIo64.sys DeviceIoControl dispatch path accepts port-read and port-write requests without restricting low-privileged callers. A low-privileged Windows account can use the signed kernel driver to access hardware ports, enabling information disclosure, elevated code execution, or system disruption.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in ITE Tech. Inc ITE IO Access 1.0.0.0 allows local users to read and write arbitrary I/O ports via crafted IOCTL requests. The WinIo64.sys DeviceIoControl dispatch path accepts port-read and port-write requests without restricting low-privileged callers. A low-privileged Windows account can use the signed kernel driver to access hardware ports, enabling information disclosure, elevated code execution, or system disruption.

The record

CVE
CVE-2024-55407
Published
Jan 6, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1284, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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